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Diffstat (limited to '')
-rw-r--r-- | src/PcmChannels.hxx | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/PcmChannels.hxx b/src/PcmChannels.hxx new file mode 100644 index 000000000..ede49cd81 --- /dev/null +++ b/src/PcmChannels.hxx @@ -0,0 +1,97 @@ +/* + * Copyright (C) 2003-2013 The Music Player Daemon Project + * http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef MPD_PCM_CHANNELS_HXX +#define MPD_PCM_CHANNELS_HXX + +#include <stdint.h> +#include <stddef.h> + +struct pcm_buffer; + +/** + * Changes the number of channels in 16 bit PCM data. + * + * @param buffer the destination pcm_buffer object + * @param dest_channels the number of channels requested + * @param src_channels the number of channels in the source buffer + * @param src the source PCM buffer + * @param src_size the number of bytes in #src + * @param dest_size_r returns the number of bytes of the destination buffer + * @return the destination buffer + */ +const int16_t * +pcm_convert_channels_16(struct pcm_buffer *buffer, + unsigned dest_channels, + unsigned src_channels, const int16_t *src, + size_t src_size, size_t *dest_size_r); + +/** + * Changes the number of channels in 24 bit PCM data (aligned at 32 + * bit boundaries). + * + * @param buffer the destination pcm_buffer object + * @param dest_channels the number of channels requested + * @param src_channels the number of channels in the source buffer + * @param src the source PCM buffer + * @param src_size the number of bytes in #src + * @param dest_size_r returns the number of bytes of the destination buffer + * @return the destination buffer + */ +const int32_t * +pcm_convert_channels_24(struct pcm_buffer *buffer, + unsigned dest_channels, + unsigned src_channels, const int32_t *src, + size_t src_size, size_t *dest_size_r); + +/** + * Changes the number of channels in 32 bit PCM data. + * + * @param buffer the destination pcm_buffer object + * @param dest_channels the number of channels requested + * @param src_channels the number of channels in the source buffer + * @param src the source PCM buffer + * @param src_size the number of bytes in #src + * @param dest_size_r returns the number of bytes of the destination buffer + * @return the destination buffer + */ +const int32_t * +pcm_convert_channels_32(struct pcm_buffer *buffer, + unsigned dest_channels, + unsigned src_channels, const int32_t *src, + size_t src_size, size_t *dest_size_r); + +/** + * Changes the number of channels in 32 bit float PCM data. + * + * @param buffer the destination pcm_buffer object + * @param dest_channels the number of channels requested + * @param src_channels the number of channels in the source buffer + * @param src the source PCM buffer + * @param src_size the number of bytes in #src + * @param dest_size_r returns the number of bytes of the destination buffer + * @return the destination buffer + */ +const float * +pcm_convert_channels_float(struct pcm_buffer *buffer, + unsigned dest_channels, + unsigned src_channels, const float *src, + size_t src_size, size_t *dest_size_r); + +#endif |